I know it seems really obvious since it's always on top left of the window, but people in my team and I are always going to the last place we imagine a task to be, but the search function will bring up any and all relevant results, including 'lost' tasks, completed tasks, and it's usually so much quicker.
Also, the dashboard feature is really key for a quick glance to read data and ongoing projects. We use it to pick up missed tags from tasks so everything can be organised for data properly 